Recently, I assembled one of the RX02 emulator boards developed by
AK6DN.? I am using it presently in a BA11-M box with PDP-11/2 cpu
(really basic 16 bit system).? I put the disk images from github on the
SD card (RT11 V5.07 and XXDP not sure what version).
The box has a BDV11 bootstrap / terminator board and I use this to boot
the RX02 emulator.? Works fine when I boot RT11, however I can't boot
XXDP - it halts at 000104.
Do I need to use a different version of XXDP to run on the PDP-11/03?
Doug
Hello All,
Does anyone out there by any chance have the Service Manual for a Compaq
SystemPro XL or at least schematics to the PSU? Trying to revive one of
these systems and the PSU is not working. TIA!
-Ali
At Rice in the early 90s the department was "Electrical and Computer Engineering" if my hazy memory serves.
The genealogy of Computer Science departments (and their curricula) (at least in the US) is also weird and historically-contingent. Basically it seems to have been a tossup at any given school whether it came out of the Electr[ical|onic] Engineering department, in which case it was memories and logic gates and a bottom-up, hardware-focused curriculum, or out of the Mathematics department, in which case it was algorithms and complexity analysis and a software-focused curriculum.
Adam
Just for reference the following site has ribbons for the subject card
punches.
https://www.aroundtheoffice.com/IBM-026-Keypunch-Ribbon/productinfo/RP-520-I
BM/
I bought some a few years ago. As I understand it he makes a batch every
year or so. I don't know but he might like the used reels back to use
again. :-)
Donald
Or some RN 68 pin CLCC sockets, or even a part number for them?
I tried buying a 1981 RFN catalog, but they weren't in there.
I have a bunch of IMS 80186 slave cards with the CPUs pulled
Of course, they didn't keep the caps. RN was bought by 3M and
I've been unable to even find a part number for these sockets.
I'm hoping not to have to replace the sockets to get these boards
working.
Pics of what I need are here
https://twitter.com/bitsavers/status/1161075014235385857
I have a question about cable length - any electrical engineers in the
house?
Connected a Qualstar 1260 tape drive to an Emulex TC02 qbus tape
controller in a pdp-11/53.? The interface is pertec with 2 50 pin cables.
When I use a pair of short flat ribbon cables, 18 and 30 inches each, it
works.? Under RT11 I can INIT, Copy, DUMP, do a Directory.
It doesn't work when I use a pair of 5 foot long flat ribbon cables.?
Are they too long?? Do I need twisted pair type of cable?? Is it
possibly a termination problem?
Doug
I picked up Eric's DP 1500 Z80 system at VCF West this weekend, unfortunately
the boot disk has bad sectors. Anyone have any diskettes/images around for the
1500 or any other version of their systems?
I took pics and dumped the firmware from it along with a DP 1551 pcb I've had
for a while, and have been uploading the manuals to bitsavers that came with it,
as well as a bunch that I've had scanned in the backlog
> I didn't fully disassamble the program
I have now done so; the -YK is _exactly_ the same as the -YA (the later ones,
which are minorly different from what's in the manual), except that the HSR
address (177550) has been replaced as the primary device address by that of
DL11 #1, in the second block of DL11 addresses (175610).
In other words, the ROM is prepared to load something in bootstrap loader
format (which I have documented here:
http://gunkies.org/wiki/PDP-11_Bootstrap_Loader
the one program known in this format is the absolute loader) over the
non-console serial line.
Noel
Hi list,
Just came across this:
https://www.ebay.com/itm/Vintage-Computing-CDC-Magnetic-Peripherals-Control…
Haven't seen one listed in years. The price lets me assume that this offer addresses customers that may use these drives in a production environment or so...
I am not aware of museums or hobbyists who have such drives currently in a functional state to read and write from and to 80MB (CDC 9762) or 300MB (CDC 9766) disk packs. Maybe the CHM? ... not taking into consideration the CHM activities related to the Xerox disk cartidge? (2315-equivalent) software archive project.
Anybody out there? Would be interesting to know.
Best regards,
Pierre
-----------------------------------------------------------------------------
http://www.digitalheritage.de
I'm looking for a full set of manuals for the Microsoft Professional
Development System v7.1. If anyone here has them to loan for scanning or
to sell, please contact me directly.
Thanks!
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby. Geeks collect hobbies.
ScarletDME - The red hot Data Management Environment
A Multi-Value database for the masses, not the classes.
http://scarlet.deltasoft.com - Get it _today_!
